Aircraft Manufacturing (OEMs) Aviation Safety & Regulation Boeing 737

GE to roll out a Leap-1B update in 2026 to address cabin-smoke concerns; CFM is advancing certification work for finalized EEC s

GE will introduce a Leap-1B engine update this year as part of the certification process to address a cabin-smoke concern tied to activation of a load-reduction device. Separately, CFM says work on a finalized Leap-1B EEC software load is underway to resolve safety concerns affecting the 737 MAX.

Discovered 2026-05-21T03:15:09.946654-07:00 | 2026-05-21T03:15:09.946654-07:00

Briefing

What Hype is tracking

The update targets a defined in-service issue—cabin-smoke concerns linked to activation of a load-reduction device—moving from design changes into the certification process.
CFM’s progress on finalized Leap-1B EEC software load work for the 737 MAX shows the fix is expected to be implemented through engine control software, not only hardware changes.
This follows GE’s broader pattern of in-service performance fixes, as seen in its foam engine-wash approach for degraded engines (source:9be30ade-9732-46be-b923-ee3dc107dff9).

Reported By

Aviacionline FlightGlobal Aviation Week